When the sun started to rise and light up the city around them, Sonic was still asleep. His ears twitched and moved from time to time, as if listening for the sounds he had thought he had heard in his dream. He let out a kit-like squeak in his sleep, if he was dreaming about his early childhood, when he and Sonya shared the same cage and before the experiments really began, which, in reality, he was dreaming about just that. A second squeak came from him and then fell silent for a while after that. The sound of his breathing was the only sound heard from him, and his side slowly rose and fell as he breathed.

As for Knuckles, he was asleep was well, as result of not having slept well during the night. And the squeaks that presumably came from one of the sleeping hedgehogs from time to time didn't help either, as the sounds kept waking him up throughout the night.